import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import User from '../components/users/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'

Vue.use(VueRouter)

const routes = [
    {
        path:'/',
        redirect:'/login'
    },
   {
       path:'/login',
       component:Login
   } ,
   {
      path:'/home',
      component:Home,
      redirect:'/welcome',
      children:[
          {
            path:'/welcome',
            component : Welcome
         },
         {
            path:'/users',
            component : User
         },
         {
            path:'/rights',
            component : Rights
         },
         {
            path:'/roles',
            component : Roles
         }
      ]
   }
 
]

const router = new VueRouter({
  routes:routes
})

// 挂载路由导航守卫
router.beforeEach((to,from,next)=>{
//   to将要访问的路径
// from 代表从哪个路径跳转而来
// next是一个函数，表示放行
// next() 放行   next("/login") 强制跳转
    if (to.path==="/login") {
        return next();
    }
    // 获取token
    const tokenStr=window.sessionStorage.getItem('token');
    if (!tokenStr) {
        return next('/login')
    }else{
        next();
    }
})

export default router
